Dual-head fan

ABSTRACT

A dual-head fan is disclosed herein, comprising a drum fan, a first wind shell on the drum fan, an outer shield on one side of the first wind shell, a moving panel accommodated in the first wind shell, a supporting plate at a top of the first wind shell and having a hollow portion at a center thereof and an engaging part in a middle of the hollow portion for engaging with an upper end of the moving panel by one side thereof, an air duct baffle engaged with the other side of the engaging part of the supporting plate and having two laterals connected with a second wind shell and a lower outlet shell having a top surface, and an upper outlet shell rotatably connected on upper sides of the second wind shell and the lower outlet shell to regulate airflow direction by rotation.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a dual-head fan which can adjust air outflowing from its one or two fan heads, air volume and airflow direction so as to achieve the desired blowing effect.

2. Description of Related Art

The current fan has only one single function and one air outflowing direction which is inconvenient in use. For instance, the Taiwan Pat. No. TW M306279(U), issued on 11 Feb. 2007, has disclosed a bidirectional fan structure having an axis. It comprises an axis and two impellers disposed at two ends of the axis respectively. Curved surfaces of plural fan blades of the two impellers are opposite to each other. The axis is connected to a motor so that the two impellers are synchronously driven to rotate when the motor is activated. The two impellers generate airflows with opposite directions and forming bidirectional airflow including exhaust airflow and suction airflow at the same time. However, air outflowing directions of the bidirectional fan structure cannot be regulated due to the two impellers fixing at two ends of the axis.

The China Pat. No. CN107461357(A), published on 12 Dec. 2017, has disclosed a double-ended fan which comprises a bidirectional head-shaking mechanism driven by a motor and slowed down by a reduction gear. The reduction gear comprises two gears at a tail end to form a crank. The reduction gear drives the crank to move and then the crank further drives a bevel gear to move. Accordingly, the double-ended fan can shake the head in multi-directions by the direction-changing characteristic of the bevel gear. However, the abovementioned double-ended fan has a complicated structure and a high production cost.

SUMMARY OF THE INVENTION

The present invention relates to a dual-head fan which can adjust air outflowing from its one or two fan heads, air volume and airflow direction so as to achieve the desired blowing effect.

The dual-head fan of the present invention comprises a drum fan, a first wind shell, an outer shield, a moving panel, a supporting plate, an air duct baffle, a second wind shell, a lower outlet shell, an upper outlet shell, and the upper outlet shell which is rotatably connected on upper sides of the second wind shell and the lower outlet shell to regulate airflow direction by rotation. The first wind shell is disposed on an upper side of the drum fan; the outer shield is disposed on one side of the first wind shell; the moving panel is accommodated in the first wind shell; and the supporting plate is disposed at a top of the first wind shell. The supporting plate has a hollow portion at its center and an engaging part disposed in a middle of the hollow portion and engaged with an upper end of the moving panel by its one side. The other side of the engaging part is engaged with a lower end of the air duct baffle. The second wind shell and the lower outlet shell are connected to two laterals of the air duct baffle respectively, and the lower outlet shell is provided with a top surface.

According to an embodiment of the present invention, the drum fan comprises a seat, an impeller disposed at the seat, and a lid covered on the seat.

According to an embodiment of the present invention, a lateral surface of the first wind shell is provided with a protruding portion, and the outer shield is provided with a groove corresponding to the protruding portion for engagement.

According to an embodiment of the present invention, the lower outlet shell and the upper outlet shell are provided with a first outlet and a second outlet respectively.

The dual-head fan of the present invention adjusts air outflowing from one or two fan heads and air volume of the first outlet and the second outlet by swinging the moving panel. Furthermore, the upper outlet shell can be rotated to adjust airflow direction. Accordingly, the present invention achieves various air outflowing effects and improves its practicality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded diagram showing a dual-head fan of the present invention;

FIG. 2 is a schematic diagram showing an air outflowing direction of a dual-head fan of the present invention in use;

FIG. 3 is a stereogram showing an appearance of a dual-head fan of the present invention in assembly.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

To provide a thorough understanding, the purpose and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3, the dual-head fan of the present invention comprises a drum fan (1), a first wind shell (2), an outer shield (3), a moving panel (4), a supporting plate (5), a second wind shell (6), an air duct baffle (7), a lower outlet shell (8), and an upper outlet shell (9).

The drum fan (1) comprises a seat (11), an impeller (12) disposed at the seat (11), and a lid (13) covered on the seat (11).

The first wind shell (2) is disposed on an upper side of the drum fan (1), and the outer shield (3) is disposed on one side of the first wind shell (2). The moving panel (4) is accommodated in the first wind shell (2), and the supporting plate (5) is disposed at a top of the first wind shell (2). The supporting plate (5) has a hollow portion (51) at a center thereof and an engaging part (52) in a middle of the hollow portion (51) for engaging with an upper end of the moving panel (4) by one side thereof. Preferentially, a lateral surface of the first wind shell (2) is provided with a protruding portion (21), and the outer shield (3) is provided with a groove (31) corresponding to the protruding portion (21) for engagement.

The air duct baffle (7) is engaged with the other side of the engaging part (52) of the supporting plate (5) by a lower end thereof, and the air duct baffle (7) has two laterals connected with the second wind shell (6) and the lower outlet shell (8). The second wind shell (6) and the lower outlet shell (8) are also disposed on the supporting board (5). The lower outlet shell (8) has a top surface (81) and a first outlet (82).

The upper outlet shell (9) has a second outlet (91) and is rotatably connected on upper sides of the second wind shell (6) and an upper side of the lower outlet shell (8) to regulate airflow direction by rotation.

According to the preferential embodiment abovementioned, and please refer to FIG. 2, the dual-head fan of the present invention has a drum fan (1) which is provided with the first wind shell (2) and the supporting plate (5) on it. The moving panel (4) is accommodated in the first wind shell (2) and engaged with the supporting plate (5) to regulate air outflowing from the first outlet (82) and the second outlet (91) by swinging, and achieves effects of air outflowing from one fan head and two fan heads and adjusting air volume of the first outlet (82) and the second outlet (91). The second wind shell (6), the air duct baffle (7) and the lower outlet shell (8) are disposed on the supporting plate (5), and the air outflowing direction can be regulated by rotation of the upper outlet shell (9) to achieve the desired blowing effect.

Accordingly, the present invention has characters of multiple functions, delicate structure and convenience when using. 

What is claimed is:
 1. A dual-head fan, comprising a drum fan; a first wind shell disposed on an upper side of the drum fan; an outer shield disposed on one side of the first wind shell; a moving panel accommodated in the first wind shell; a supporting plate disposed at a top of the first wind shell and having a hollow portion at a center thereof and an engaging part in a middle of the hollow portion for engaging with an upper end of the moving panel by one side thereof; an air duct baffle engaged with the other side of the engaging part of the supporting plate by a lower end thereof and having two laterals connected with a second wind shell and a lower outlet shell, wherein the lower outlet shell has a top surface; and an upper outlet shell rotatably connected on upper sides of the second wind shell and the lower outlet shell to regulate airflow direction by rotation.
 2. The dual-head fan as claimed in claim 1, wherein the drum fan comprises a seat, an impeller disposed at the seat, and a lid covered on the seat.
 3. The dual-head fan as claimed in claim 1, wherein a lateral surface of the first wind shell is provided with a protruding portion, and wherein the outer shield is provided with a groove corresponding to the protruding portion for engagement.
 4. The dual-head fan as claimed in claim 1, wherein the lower outlet shell and the upper outlet shell are provided with a first outlet and a second outlet respectively. 